ALM-9738 Temperature high or low alarm

Description

The alarm is reported when the temperature of the air inlet and fan box exceeds the thresholds. Air inlet’s Upper thrsh.is 60oC, Fan box’s Upper thrsh.is 80oC, Air inlet’s Lower thrsh. is -20oC,Fan box’s Lower thrsh. Is -20oC,Air inlet’s Upper limit is 70oC,and Air inlet’s Lower limit is -45oC.

Attribute

Alarm ID	Alarm Severity	Alarm Type
9738	Major	Fault

Parameters

ID	Name	Meaning
1	Site No.	Number of the site where the faulty board or module is located Value range: 0-2047
2	Board Type	Number of the type which the faulty board belongs to. 69:NFCB 93:FMU 94:FMUA
3	Board No.	Number of the fault board 0-5:NFCB/FMU/FMUA
4	PassNo	Number of the passage where the faulty board is located.
5	SubLink No.	Alarm sub-category number 0:over high temperature of the air inlet 1:over low temperature of the air inlet 2:over high temperature of the fan box 3:over low temperature of the fan box
6	Cell Index	Index of the cell where the board or module is located 0-2047: Cell index of the faulty cell in the data configuration 65535: None
7	Site Type	Type of the site where the faulty board is located. 12:BTS3012; 13:BTS3006C; 14:BTS3002E; 15:BTS3012AE; 16:BTS3012 II; 18:BTS3900 GSM; 19:BTS3900A GSM;
8	RackNo	Number of the rack where the faulty board is located.
9	BoxNo	Number of the subrack where the faulty board is located.
10	SlotNo	Number of the slot where the faulty board is located.
11	Site Name	Site Name
12	Alarm Attribute	Alarm Character 0:Normal 1:Transient Count

Impact on the System

The services may be interrupted or the hardware may be destroyed when the alarm is reported. All other normal fans auto run in full speed after the alarm.

System Actions

None.

Possible Causes

The environment temperature is over high or low.
The alarm thresholds are set incorrectly.
The temperature sensor is faulty.
The fan box is faulty.

Procedure

Query the current temperature of the cabinet.
1. Check whether the temperature of the cabinet is too high.
Check whether the temperature sensor alarm exists.
1. View the active alarm and check whether alarm 9374 exists, which is the temperature sensor alarm:
  Y => The precedent alarms exist. Go to step b.
  
  N => The precedent alarms do not exist. Go to procedure 3.
2. Handle the temperature sensor alarm.
3. Check whether the alarm is cleared:
  Y => The alarm is cleared. The alarm handling ends.
  
  N => The alarm is not cleared. Go to procedure 3.
Check whether the alarms related to the fans exist.
1. View the active alarm, and check whether alarm 9736 exists, which is the fan fault alarm:
  Y => The precedent alarms exist. Go to step b.
  
  N => The precedent alarms do not exist. Go to procedure 4.
2. Clear the fan fault alarm.
3. Check whether the alarm is cleared:
  Y => The alarm is cleared. The alarm handling ends.
  
  N => The alarm is not cleared. Go to procedure 4.
Check whether the air conditioner in the equipment room is working normally.
1. Check on site whether the air conditioner in the equipment room is working normally on site:
  Y => The air conditioner is functional. Go to procedure 5.
  
  N => The air conditioner is faulty. Go to step b.
2. Restore the air conditioner.
3. Check whether the alarm is cleared:
  Y => The alarm is cleared. The alarm handling ends.
  
  N => The alarm is not cleared. Go to procedure 5.
Check whether the alarm is cleared when the indoor temperature is below 30℃.
1. Check whether the alarm is cleared when the indoor temperature is below 30℃.
  Y => The alarm is cleared. The alarm handling ends.
  
  N => The alarm is not cleared. Contact Huawei Customer Service Center.